SH7014 Datasheet, PDF (504/754 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

16. Pin Function Controller (PFC)
16.3.9 Port E I/O Register (PEIOR)
The port E I/O register (PEIOR) is a 16-bit read/write register that selects input or output
for the 16 port E pins. Bits PE15IOR to PE0IOR correspond to pins PE15/DACK1 to
PE0/TIOC0A/DREQ0. PEIOR is enabled when the port E pins function as general input/outputs
(PE15 to PE0) or TIOC pin of the MTU. For other functions, it is disabled.
When the port E pin functions are as PE15 to PE0, or TIOC pin of the MTU, a given pin in port E
is an output pin if its corresponding PEIOR bit is set to 1, and an input pin if the bit is cleared to 0.
PEIOR is initialized to H'0000 by external power-on reset; however, it is not initialized for reset
by WDT, standby mode, or sleep mode, so the previous data is maintained.
Bit: 15
14
13
12
11
10
9
8
PE15 PE14 PE13 PE12 PE11 PE10 PE9 PE8
IOR
IOR
IOR
IOR
IOR
IOR
IOR
IOR
Initial value: 0
0
0
0
0
0
0
0
R/W: R/W R/W R/W R/W R/W R/W R/W R/W
Bit: 7
6
5
4
3
2
1
0
PE7 PE6 PE5 PE4 PE3 PE2 PE1 PE0
IOR
IOR
IOR
IOR
IOR
IOR
IOR
IOR
Initial value: 0
0
0
0
0
0
0
0
R/W: R/W R/W R/W R/W R/W R/W R/W R/W
Rev.5.00 Sep. 27, 2007 Page 470 of 716
REJ09B0398-0500